Buying on Margin.

Your stock worth $10,000 on margin (50%). Now the value of your stock has declined $7,000 and you receive a margin call. How much cash do you need to bring the margin back to the minimum level?

I need step by step explanation plus answer thanks.

9) Buying on margin. You purchase stock worth $10,000 on margin (50%). Now the value of your stock has declined to $7.000 and you receive a margin call. How much cash do you need to bring the margin back to the minimum level